Warm-up jacket



FIG. 1 is a front elevational view of a warm-up jacket showing my new design in use, the broken lines partially showing a human form in both views being for illustrative purposes only and forming no part of the claimed design; and,

FIG. 2 is a rear elevational view thereof.

The partial broken line showings of the human form in FIG. 1 and FIG. 2 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a warm-up jacket, as shown and described. 